My sister, who is a social worker, worked with a kindergartener who said to a teacher "I'm going to blow your f'n head off" (that may not be an exact quote).
I'm not a huge fan of threads about kid complaining. There's almost always some reason behind the behavior, and all too often, it's horrifying.
I am often dismayed at my prof friends making social media posts making fun of students or complaining about one thing or another. Over a drink with friends is one thing, in "public" is another.